Warm-Up! 
1. What is the molarity of an aqueous solution containing 40 g of NaOH in 1.5
L of solution?
2. How many grams of NaCl should be dissolved in 100 L of salt water to have
0.01 M solution?
Solution Concentrations
Teach us!
1. Density
1. What is the density of 0.5 L diet coke that has 0.05 g of sugar in it?
2. How many grams of sugar are dissolved in a 0.355 L can of regular coke
with the density of 110 g/L?
2. Molarity (M)
1. 0.1 L intravenous (IV) solution contains 5.1 g of glucose (C6H12O6). What is
the molarity of this solution? The molar mass of glucose is 180.18 g/mol.
2. How many grams of NaOH are needed to produce 0.25 L of a 3M solution?
3. Molality (m)
1. What is the molality of a solution containing 50 g of NaCl dissolved in 1 kg
of water?
2. How many grams of NaOH are needed in 0.5 kg of water to make a 1 m
solution?
4. ppm (parts per million)
1. 650 g of hard water contains 0.101 g of Calcium. What is this concentration
in parts per million?
2. 870 g of river water contains 0.023 g of Cadmium. Express the concentration
of Cadmium in parts per million.
5. % by mass
1. In order to maintain a Sodium Chloride (NaCl) concentration similar to
ocean water, an aquarium must contain 3.6 g NaCl per 100 g of water.
What is the percent by mass of NaCl in the solution?
2. You have 1500 g of a bleach solution. The percent by mass of the solute,
Sodium Hypocholorite (NaOCl) is 3.62%. How many grams of NaOCl are in
the solution?
6. % by volume
1. What is the percent by volume of ethanol in a solution that contains
0.035L of ethanol dissolved in 0.155 L of water?
2. If 0.018 L of methanol is used to make an aqueous solution that is 15%
by volume, how many L of solution is produced?